Last post on Nov 29, 2013 at 3:42 PM
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GMC Acadia, Transmission, SUV
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#612 of 798 2012 GMC Acadia Denali Transmission issues
May 31, 2013 (11:17 am)
I have a 2012 Acadia Denali with 21,00 miles that has a transmission with a mind of its own. When stopping at a light, the transmission doesn't always downshift. The engine will maintain 1000 to 1100 rpm's, then you will feel a jerk, transmission will downshift, and engine rpm's drop back to 600. Other times, when slowing down for a traffic light or stop sign, the transmission will downshift very hard, almost feels like someone hit you. Dealership has driven it, has been able to replicate the issue, but since there are no fault codes showing up, their attitude is that there is nothing wrong. This is the first and likely the last GMC product I will own if this is the best they can do building a product and then tell me nothing is wrong with it and that I just have to get used to it.
#613 of 798 Re: wooops it did it again...... [tnacadiaowner]
May 31, 2013 (12:00 pm)
If it is the transmission and i am sure it is.... .. I will have someone else do it.. NOT GM.. That's for dam sure!!!
#614 of 798 Re: 2012 GMC Acadia Denali Transmission issues [mbr549]
May 31, 2013 (12:14 pm)
I am sorry to hear that you have been experiencing this issue with your Acadia. I know it can be frustrating when the dealer isn't able to pinpoint the problem. Have you tried working with a different dealership to get this issue resolved? A second opinion may be worth a shot. Please let me know if you need any further assistance with this matter.
GM Customer Care
#615 of 798 Re: GMC Acadia Wave Plate Problem [kgandlg]
Jun 02, 2013 (10:23 am)
Amazing how I just went thru a similar experience. Vehicle lost power on highway, check engine light came on. The vehicle would not shift out of first gear. Took it to local GM dealer where we bought it in May 2007. The diagnosed it as a faulty transmission solenoid where the "ports" were clogged. I then commenced to ask questions how they would have become clogged as GM was the last one to have the transmission open, in July 2011 when they replaced a "faulty" backing plate. I asked could the port have been clogged as a result of not flushing the transmission when they last worked on it? "Possible, but doubtful...". GM's answer, "You are beyond the warranty, so it is your responsibility". Spoke to Alex, GM Customer Service. Explained to him the story, two days later another woman called stating GM cannot help as it is beyond the warranty. When asked about the possibility of contaminated il cogging the port, she stated, " I am not a technical person, I have to rely on the Service Writer". The same service Writer, Joe, who charged me for a front end alignment he could not find where I authorized it. My cost, "$1668.00" By the way lets not forget the timing chains replaced at less than 40K miles, or the fire in the front wiring harness, ( my portion of the repair was $300.00), or my cost for replacing the steering assembly, $900.00, because it is not part of the drive train??? Then the transmission in July 2011 which they stated, we will repair, as a "Good Faith", even through it was after I sent a tow truck to get it to have it repaired elsewhere.
If you find a lawyer, please keep me informed as I too am looking.....
#616 of 798 Do NOT buy a GMC Acadia
Jun 03, 2013 (10:01 am)
I have a 2007 Acadia which has had one problem after another, many of them MAJOR problems - transmission, timing chain, transmission control module. GMC Corporate informed me that they will not provide any assistance for my most recent $1300 issue - this after a long delay in returning my call, putting me on hold for an unacceptable amount of time, and no proof of the research that brought them to that decision. I am extremely disappointed in their lack of customer service and vow never to buy another GMC vehicle again. I am telling all of my friends and family the same.
#617 of 798 Re: GMC Acadia Wave Plate Problem [hoppybill]
Jun 03, 2013 (7:41 pm)
I experienced the same problem last week. Acadia went into neutral while on highway, driving 60 mph, then went into first and wouldn't shift out of first. We had transmission "re-built" at 62,000 miles, now at 83,000 the transmission needs to be replaced AGAIN. Our warranty just ended 4 months ago, so we were told new transmission would be $4000.
If anyone finds a lawyer, please let me know!
#618 of 798 Re: ACADIA problems [sportskidsmom5]
Jun 05, 2013 (3:01 pm)
If your Acadia has less than 120K miles GMC is now (as of Nov.-Dec. 2012) footing the bill for the Stabilitrak issue under what they called an "extended warranty" (an 'act of good will' to keep them from getting their pants sued off for manufacturing these $35-40K lemons with cheap parts). And it is a major safety concern, so they should be held accountable (I lost all engine power while driving uphill in a 70 MPH zone on a busy interstate w/ my 2 kids in the backseat). The problem is actually a bad timing chain and not the transmission, though if not fixed can ultimately burn up the trans. I have an awesome mechanic who diagnosed the bad timing chain and did some research to find that GMC was covering it (just not publicizing it apparently as I had already spent hours searching and found nothing to indicate this). My husband called GMC Customer Service (not the dealer) and told them we'd taken it to the mechanic and when he told them what the engine codes were and the problems manifested from it, they totally changed their tone, from skeptical to extremely cooperative. They arranged for the GMC dealer of our choosing to replace the timing chains absolutely free of charge for us. GMC is also reimbursing those who had to pay out of pocket for the same, and I may be wrong but I think any other repairs related to the bad timing chain (i.e., transmission) and I believe it applies at least to 2007-08, maybe other year models, with <120K miles at the time repairs were done.
#619 of 798 Re: ACADIA problems [sbelle]
Jun 05, 2013 (3:07 pm)
BTW, if you look up recalls even by VIN#, it yields nothing about GMC's "warranty extension" or a recall on the timing chain. And strangely, we got a letter from GMC with the specifications I mentioned above only a few days after calling GMC Customer Service!
#620 of 798 Re: ACADIA problems [sbelle]
Jun 06, 2013 (6:07 am)
Mine is a 2012 with 21K miles on it. Since there have been no fault codes recorded, GM is unwilling or unable to do anything about the problem. Add to the fact that the gas mileage is pathetic, less than 20mpg on the highway and about 16mpg with in town driving, I am less than enamoured with GM and their quality. To add insult to injury, someone claiming to be a representative of GM posted on my original post that I should take it to a different GM dealer to see if they could figure something out. My thought is that shouldn't all dealerships be staffed with competent and knowledgeable personnel who can diagnose and repair issues such as this. Right now, I'm leaning towards trading it for something else instead of putting up with GM and their lack of customer service.
#621 of 798 Re: ACADIA problems [mbr549]
Jun 06, 2013 (6:48 am)
not defending gm, but to get 20mpg,with this small of a motor moving a 5000 pound vehicle is damn good! and it will cruise at 95 mph all day long.